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1import * as assert from 'assert';
2import * as fs from 'fs';
3import * as vscode from 'vscode';
4
5import {
6 MappedRustDiagnostic,
7 mapRustDiagnosticToVsCode,
8 RustDiagnostic,
9 SuggestionApplicability,
10} from '../../../utils/diagnostics/rust';
11
12function loadDiagnosticFixture(name: string): RustDiagnostic {
13 const jsonText = fs
14 .readFileSync(
15 // We're actually in our JavaScript output directory, climb out
16 `${__dirname}/../../../../src/test/fixtures/rust-diagnostics/${name}.json`,
17 )
18 .toString();
19
20 return JSON.parse(jsonText);
21}
22
23function mapFixtureToVsCode(name: string): MappedRustDiagnostic {
24 const rd = loadDiagnosticFixture(name);
25 const mapResult = mapRustDiagnosticToVsCode(rd);
26
27 if (!mapResult) {
28 return assert.fail('Mapping unexpectedly failed');
29 }
30 return mapResult;
31}
32
33describe('mapRustDiagnosticToVsCode', () => {
34 it('should map an incompatible type for trait error', () => {
35 const { diagnostic, suggestedFixes } = mapFixtureToVsCode(
36 'error/E0053',
37 );
38
39 assert.strictEqual(
40 diagnostic.severity,
41 vscode.DiagnosticSeverity.Error,
42 );
43 assert.strictEqual(diagnostic.source, 'rustc');
44 assert.strictEqual(
45 diagnostic.message,
46 [
47 `method \`next\` has an incompatible type for trait`,
48 `expected type \`fn(&mut ty::list_iter::ListIterator<'list, M>) -> std::option::Option<&ty::Ref<M>>\``,
49 ` found type \`fn(&ty::list_iter::ListIterator<'list, M>) -> std::option::Option<&'list ty::Ref<M>>\``,
50 ].join('\n'),
51 );
52 assert.strictEqual(diagnostic.code, 'E0053');
53 assert.deepStrictEqual(diagnostic.tags, []);
54
55 // No related information
56 assert.deepStrictEqual(diagnostic.relatedInformation, []);
57
58 // There are no suggested fixes
59 assert.strictEqual(suggestedFixes.length, 0);
60 });
61
62 it('should map an unused variable warning', () => {
63 const { diagnostic, suggestedFixes } = mapFixtureToVsCode(
64 'warning/unused_variables',
65 );
66
67 assert.strictEqual(
68 diagnostic.severity,
69 vscode.DiagnosticSeverity.Warning,
70 );
71 assert.strictEqual(
72 diagnostic.message,
73 [
74 'unused variable: `foo`',
75 '#[warn(unused_variables)] on by default',
76 ].join('\n'),
77 );
78 assert.strictEqual(diagnostic.code, 'unused_variables');
79 assert.strictEqual(diagnostic.source, 'rustc');
80 assert.deepStrictEqual(diagnostic.tags, [
81 vscode.DiagnosticTag.Unnecessary,
82 ]);
83
84 // No related information
85 assert.deepStrictEqual(diagnostic.relatedInformation, []);
86
87 // One suggested fix available to prefix the variable
88 assert.strictEqual(suggestedFixes.length, 1);
89 const [suggestedFix] = suggestedFixes;
90 assert.strictEqual(
91 suggestedFix.title,
92 'consider prefixing with an underscore: `_foo`',
93 );
94 assert.strictEqual(
95 suggestedFix.applicability,
96 SuggestionApplicability.MachineApplicable,
97 );
98 });
99
100 it('should map a wrong number of parameters error', () => {
101 const { diagnostic, suggestedFixes } = mapFixtureToVsCode(
102 'error/E0061',
103 );
104
105 assert.strictEqual(
106 diagnostic.severity,
107 vscode.DiagnosticSeverity.Error,
108 );
109 assert.strictEqual(
110 diagnostic.message,
111 [
112 'this function takes 2 parameters but 3 parameters were supplied',
113 'expected 2 parameters',
114 ].join('\n'),
115 );
116 assert.strictEqual(diagnostic.code, 'E0061');
117 assert.strictEqual(diagnostic.source, 'rustc');
118 assert.deepStrictEqual(diagnostic.tags, []);
119
120 // One related information for the original definition
121 const relatedInformation = diagnostic.relatedInformation;
122 if (!relatedInformation) {
123 assert.fail('Related information unexpectedly undefined');
124 return;
125 }
126 assert.strictEqual(relatedInformation.length, 1);
127 const [related] = relatedInformation;
128 assert.strictEqual(related.message, 'defined here');
129
130 // There are no suggested fixes
131 assert.strictEqual(suggestedFixes.length, 0);
132 });
133
134 it('should map a Clippy copy pass by ref warning', () => {
135 const { diagnostic, suggestedFixes } = mapFixtureToVsCode(
136 'clippy/trivially_copy_pass_by_ref',
137 );
138
139 assert.strictEqual(
140 diagnostic.severity,
141 vscode.DiagnosticSeverity.Warning,
142 );
143 assert.strictEqual(diagnostic.source, 'clippy');
144 assert.strictEqual(
145 diagnostic.message,
146 [
147 'this argument is passed by reference, but would be more efficient if passed by value',
148 '#[warn(clippy::trivially_copy_pass_by_ref)] implied by #[warn(clippy::all)]',
149 'for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#trivially_copy_pass_by_ref',
150 ].join('\n'),
151 );
152 assert.strictEqual(diagnostic.code, 'trivially_copy_pass_by_ref');
153 assert.deepStrictEqual(diagnostic.tags, []);
154
155 // One related information for the lint definition
156 const relatedInformation = diagnostic.relatedInformation;
157 if (!relatedInformation) {
158 assert.fail('Related information unexpectedly undefined');
159 return;
160 }
161 assert.strictEqual(relatedInformation.length, 1);
162 const [related] = relatedInformation;
163 assert.strictEqual(related.message, 'lint level defined here');
164
165 // One suggested fix to pass by value
166 assert.strictEqual(suggestedFixes.length, 1);
167 const [suggestedFix] = suggestedFixes;
168 assert.strictEqual(
169 suggestedFix.title,
170 'consider passing by value instead: `self`',
171 );
172 // Clippy does not mark this with any applicability
173 assert.strictEqual(
174 suggestedFix.applicability,
175 SuggestionApplicability.Unspecified,
176 );
177 });
178
179 it('should map a mismatched type error', () => {
180 const { diagnostic, suggestedFixes } = mapFixtureToVsCode(
181 'error/E0308',
182 );
183
184 assert.strictEqual(
185 diagnostic.severity,
186 vscode.DiagnosticSeverity.Error,
187 );
188 assert.strictEqual(
189 diagnostic.message,
190 ['mismatched types', 'expected usize, found u32'].join('\n'),
191 );
192 assert.strictEqual(diagnostic.code, 'E0308');
193 assert.strictEqual(diagnostic.source, 'rustc');
194 assert.deepStrictEqual(diagnostic.tags, []);
195
196 // No related information
197 assert.deepStrictEqual(diagnostic.relatedInformation, []);
198
199 // There are no suggested fixes
200 assert.strictEqual(suggestedFixes.length, 0);
201 });
202
203 it('should map a macro invocation location to normal file path', () => {
204 const { location, diagnostic, suggestedFixes } = mapFixtureToVsCode(
205 'error/E0277',
206 );
207
208 assert.strictEqual(
209 diagnostic.severity,
210 vscode.DiagnosticSeverity.Error,
211 );
212 assert.strictEqual(
213 diagnostic.message,
214 [
215 "can't compare `{integer}` with `&str`",
216 'the trait `std::cmp::PartialEq<&str>` is not implemented for `{integer}`',
217 ].join('\n'),
218 );
219 assert.strictEqual(diagnostic.code, 'E0277');
220 assert.strictEqual(diagnostic.source, 'rustc');
221 assert.deepStrictEqual(diagnostic.tags, []);
222
223 // No related information
224 assert.deepStrictEqual(diagnostic.relatedInformation, []);
225
226 // There are no suggested fixes
227 assert.strictEqual(suggestedFixes.length, 0);
228
229 // The file url should be normal file
230 // Ignore the first part because it depends on vs workspace location
231 assert.strictEqual(
232 location.uri.path.substr(-'src/main.rs'.length),
233 'src/main.rs',
234 );
235 });
236});
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